Hi there, I need to know why a singularity in astrophysics is called a singularity. I have a general idea about what a singularity is but I am yet to find out which of the more commonplace meanings of the word the originator of this term had in mind when s/he used it in the context of astrophysics. For example, did they intend the word to be associated with peculiarity or oddness or uniqueness or the state or quality of being one of a kind or did they intend it to be associated with the idea of being single or "singular" as in singular nouns? I am aware that the latter suggestion sounds preposterous but the received Turkish equivalent of singularity, tekillik , which I intend to avoid using in translating a book by Lawrence M. Krauss into Turkish, fails to make sense to me except as a grammatical term. So this question is more about etymology than science but I couldn't possibly have asked it at an arts forum.